#!/usr/bin/python2.5

#

# Copyright 2008 the Melange authors.

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

#   http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

"""Custom widgets used for form fields.

"""

__authors__ = [

  '"Pawel Solyga" <pawel.solyga@gmail.com>',

  ]

from django import newforms as forms

from django.newforms.widgets import flatatt

from django.newforms.util import smart_unicode

from django.utils.html import escape

from django.utils import simplejson

from django.utils.safestring import mark_safe

class TinyMCE(forms.widgets.Textarea):

    """TinyMCE widget. 

    Requires to include tiny_mce_src.js in your template. Widget can be

    customized by overwriting or adding extra options to mce_settings

    dictionary

    You can set TinyMCE widget for particular form field using code below:

      class ExampleForm(forms_helpers.DbModelForm):

        content = forms.fields.CharField(widget=custom_widgets.TinyMCE())

    You can include tiny_mce_src.js in your template using:

      {% block scripts %}

    	  <script type="text/javascript" src="/tiny_mce/tiny_mce_src.js"></script>

      {% endblock %}

    """ 

    DEF_MCE_SETTINGS = { 'mode': "exact",

                         'theme': "simple",

                         'theme_advanced_toolbar_location': "top",

                         'theme_advanced_toolbar_align': "center"}

    mce_settings = DEF_MCE_SETTINGS

    TINY_MCE_HTML_FMT = u'''\

<textarea %(attrs)s>%(value)s</textarea>

<script type="text/javascript">

 tinyMCE.init(%(settings_json)s)

</script>'''

    def render(self, name, value, attrs=None):

      """Render TinyMCE widget as HTML.

      """

      if value is None:

        value = ''

      value = smart_unicode(value)

      final_attrs = self.build_attrs(attrs, name=name)

      self.mce_settings['elements'] = "id_%s" % name

      # convert mce_settings from dict to JSON

      mce_json = simplejson.JSONEncoder().encode(self.mce_settings)

      return mark_safe(self.TINY_MCE_HTML_FMT % 

          {'attrs': flatatt(final_attrs),

           'value': escape(value), 

           'settings_json':  mce_json})